Translation guide
The English word "textbook" can refer to a physical educational book, or metaphorically to something that is a perfect example of its kind. This guide covers both meanings and how to express them naturally in Japanese.
A book used in schools or for studying a subject.
The standard word for a school textbook, used from elementary to high school.
Something that is a typical or ideal example of its kind, often used in phrases like "textbook case" or "textbook example."
a textbook example of something · a textbook case · textbook perfect
Means "typical" and is the most natural way to express the metaphorical sense. Often used with 例 (example) or ケース (case).
それは典型的な例です。
That's a textbook example.
While 教科書どおり (kyōkasho dōri, "just like the textbook") exists, it often implies doing something by the book in a rigid, uncreative way. For a positive "textbook example," use 典型的な or お手本のような instead.
I forgot my math textbook.
この教科書はとても分かりやすいです。
This textbook is very easy to understand.
Often used for university-level or language-learning materials. Can also refer to a text or script.
英語のテキストを買いました。
I bought an English textbook.
A broader term for teaching materials, including textbooks, worksheets, and other resources.
この教材は初心者向けです。
This textbook/material is for beginners.
A reference book or study guide, often used alongside a main textbook for exam preparation.
試験のために参考書を買った。
I bought a study guide for the exam.
You're showing textbook symptoms.
Literally "like a model/example," used for something that is an ideal or perfect example to follow.
彼のプレーはお手本のような完璧さだ。
His play is textbook perfect.
Means "exemplary" or "model," often used in formal contexts.
彼の行動は模範的だった。
His behavior was textbook.